Chewing teeth, also known as molar teeth, are located in the last 2 to 3 teeth of the tooth row. Chewing teeth that are empty and can become loose may be caused by severe caries that causes periodontitis, pulpitis and other diseases. It can be treated by medication, supragingival scaling and subgingival scraping, root canal therapy, dental implants and so on. 1. Periodontitis: Periodontitis is caused by the inflammation of dental calculus adhering between the teeth and gums. Oral tinidazole, azithromycin and other medications should be taken as prescribed by the doctor. In severe cases, supragingival scaling and subgingival scraping are recommended to remove tartar and plaque. In severe cases, the teeth can be extracted and then implanted. 2. Pulpitis: It is an inflammation caused by the development of the cavity of chewing teeth to the pulp. There will be loose teeth, tooth pain and other symptoms. Root canal treatment can be carried out under the guidance of the doctor, which requires the use of professional equipment or cleaning solution to completely remove the infected pulp, followed by proper disinfection and tight plugging. In severe cases, the tooth may be extracted and then implanted. Therefore, when the chewing tooth is empty and will be loose should go to the hospital as soon as possible to clarify the cause of the disease, under the guidance of the doctor for standardized treatment, usually pay attention to oral hygiene, light diet, do not eat spicy and stimulating food.